<template>
  <div class='article'>
    <!-- 导航栏 -->
    <van-nav-bar
      fixed
      left-arrow
      @click-left='$router.back()'
      title='文章详情'
    ></van-nav-bar>

    <!--loading-->
    <div class='loading' v-if='loading'>
      <van-loading class='inner' type='spinner' color='#1989fa' />
    </div>

    <!-- 文章详情 -->
    <div class='detail' v-else>
      <h3 class='title'>{{ article.title }}</h3>
      <div class='author'>
        <van-image
          :src='article.aut_photo'
          round
          width='1rem'
          height='1rem'
          fit='fill' />
        <div class='text'>
          <p class='name'>{{ article.aut_name }}</p>
          <p class='time'>{{ article.pubdate | fromNow }}</p>
        </div>
        <van-button
          @click='follow'
          round
          size='small'
          type='info'
        >{{ article.is_followed ? '取关拉黑一条龙' : '+ 关注一下' }}
        </van-button>
      </div>
      <div class='content'>
        <div v-html='article.content'>正文</div>
      </div>

      <!--分割线-->
      <van-divider>END</van-divider>

      <!--按钮-->
      <div class='btns'>
        <van-button
          round size='small'
          hairline
          type='primary'
          plain
          :icon="article.attitude === 1 ? 'good-job' : 'good-job-o'"
          @click='like'
        >
          {{ article.attitude === 1 ? '取消' : '点赞' }}
        </van-button>

        <van-button
          round
          size='small'
          hairline
          type='danger'
          plain
          :icon="article.attitude === 0 ? 'delete' : 'delete-o'"
          @click='dislike'
        >
          {{ article.attitude === 0 ? '取消' : '不喜欢' }}
        </van-button>
      </div>
    </div>

    <!-- /文章详情 -->
    <comment></comment>
  </div>
</template>

<script>
import {
  addDisLike,
  addLike,
  deleteDisLike,
  deleteLike,
  followUser,
  getArticleDetail,
  unFollowUser
} from '@/api/article'
import { mapState } from 'vuex'
import comment from '@/views/article/comment'

export default {
  name: 'Detail',
  data () {
    return {
      loading: true,
      article: {}
    }
  },
  computed: {
    ...mapState('user', ['token_obj']),
    artId () {
      return this.$route.params.id
    }
  },
  methods: {
    async like () {
      console.log('喜欢')
      if (!this.token_obj.token) {
        // 没有登录
        await this.$router.push({
          path: '/login',
          query: {
            flag: true,
            // back 回来的时候，跳转到当前页面
            back: this.$route.fullPath
          }
        })
        this.$toast('请先登录')
        return
      }
      if (this.article.attitude === 1) {
        await deleteLike(this.artId)
      } else {
        await addLike(this.artId)
      }
      this.$toast.success('操作成功')
      this.article.attitude = this.article.attitude === 1 ? -1 : 1
    },
    async dislike () {
      if (!this.token_obj.token) {
        // 没有登录
        await this.$router.push({
          path: '/login',
          query: {
            flag: true,
            // back 回来的时候，跳转到当前页面
            back: this.$route.fullPath
          }
        })
        this.$toast('请先登录')
        return
      }
      if (this.article.attitude === 0) {
        await deleteDisLike(this.artId)
      } else {
        await addDisLike(this.artId)
      }
      this.$toast.success('操作成功')
      this.article.attitude = this.article.attitude === 0 ? -1 : 0
    },
    async follow () {
      // 判断用户是否已经登录
      if (!this.token_obj.token) {
        // 没有token 跳转去登陆页面
        await this.$router.push({
          path: '/login',
          query: {
            flag: true,
            // back 回来的时候，跳转到当前页面
            back: this.$route.fullPath
          }
        })
        return this.$toast('请先登录')
      }
      // 执行到这，表示已经登录，可以进行关注操作
      if (this.article.is_followed) {
        // 取消关注
        await unFollowUser(this.article.aut_id)
        this.$toast('取消关注')
      } else {
        // 关注
        await followUser(this.article.aut_id)
        this.$toast('关注成功')
      }
      // 更新关注状态
      this.article.is_followed = !this.article.is_followed
    }
  },
  async created () {
    const { data: res } = await getArticleDetail(this.artId)
    // console.log(res)
    this.article = res
    this.loading = false
  },
  components: {
    comment
  }
}
</script>

<style lang='less' scoped>
.loading {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article {
  position: absolute;
  left: 0;
  top: 0;
  overflow-y: scroll;
  width: 100%;
  height: 100%;
}

.loading {
  padding-top: 100px;
  text-align: center;
}

.error {
  padding-top: 100px;
  text-align: center;
}

.detail {
  padding: 50px 10px;

  .title {
    font-size: 16px;
  }

  .zan {
    text-align: center;
  }

  .author {
    padding: 10px 0;
    display: flex;

    .text {
      flex: 1;
      padding-left: 10px;
      line-height: 1.3;

      .name {
        font-size: 14px;
        margin: 0;
      }

      .time {
        margin: 0;
        font-size: 12px;
        color: #999;
      }
    }
  }

  .content {
    font-size: 14px;
    overflow: hidden;
    white-space: pre-wrap;
    word-break: break-all;

    ::v-deep img {
      max-width: 100%;
      background: #f9f9f9;
    }
  }

  .btns {
    width: 50%;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    align-content: center;
  }
}
</style>
